Piston for door closer



FIG. 1 is a perspective view of a piston for door closer showing our design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view of a door closer with the piston disposed therein.

The broken lines in FIGS. 1-8 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a piston for door closer, as shown and described. 